I think we already have all of that info. The problem is not what we do or do not know about the various pirate groups, the problem is that they hold several hundred hostages that they will kill if we hit them where they live.
but I agree that taking the one guy prisoner and taking him home for a very, very long stay in a federal supermax lockup after the appropriate trial has a lot to be said for it.
granted the fact that provides an incentive for more hostage taking for trade. But then, everyone and their second cousin in that area of the world is trying to snag Americans so what's new?
I think at a more fundamental level, if the other pirates see that we will let someone surrender, they may be more likely to surrender in a similar future situation.
hard to say.
but I am not one for the "take no prisoners" ROE, rather that we get them and, as you point out, gain some intel of whatever value even if its only putting some doubt in the minds of the others about what the prisoner might have said.........